What is the current water temperature in Holyhead?

Q: What is the current water temperature in Holyhead?

As of now, in Holyhead, the water temperature is 8.79°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

47.8

°F

March 20, 10:40

Trend:

increasing

Yesterday:

47.5°F

Tomorrow:

48.0°F

Sunrise:

06:22

Sunset:

18:31

Day Length:

12 h. 9 min.

Holyhead in March

Minimum:

48.2°F

Average:

49.5°F

Maximum:

50.8°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 47.8°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.5°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 47.8°F on 2017, while the historical minimum was 44.1°F on 2018.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 48.2°F, with minimum temperature starting at 48.0°F, while the maximum might reach 48.5°F.

Daily water temperature in Holyhead

Date	Current Year actual* / forecast**	last year	10 years average
Mar 6	46.6°F	47.2°F	46.2°F
Mar 7	47.0°F	47.3°F	46.2°F
Mar 8	46.8°F	46.9°F	46.1°F
Mar 9	46.9°F	47.1°F	46.1°F
Mar 10	46.8°F	47.5°F	46.1°F
Mar 11	46.7°F	47.3°F	46.0°F
Mar 12	47.0°F	47.0°F	46.0°F
Mar 13	46.8°F	47.3°F	46.1°F
Mar 14	46.5°F	47.3°F	46.0°F
Mar 15	47.1°F	47.2°F	45.9°F
Mar 16	47.0°F	47.4°F	46.1°F
Mar 17	46.7°F	47.5°F	46.3°F
Mar 18	47.2°F	47.2°F	46.3°F
Mar 19	47.5°F	47.5°F	46.5°F
Mar 20	47.8°F	47.6°F	46.3°F
Mar 21	48.0°F	47.9°F	46.6°F
Mar 22	48.1°F	47.6°F	46.6°F
Mar 23	48.1°F	47.4°F	46.6°F
Mar 24	48.2°F	47.7°F	46.7°F
Mar 25	48.2°F	47.7°F	46.8°F
Mar 26	48.4°F	48.2°F	47.0°F
Mar 27	48.5°F	47.9°F	47.0°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.5°F in Winter, 48.6°F in Spring, 58.2°F in Summer, and 57.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Caernarfon	47.9°F	19mi
Bangor	46.5°F	21mi
Conwy	46.8°F	33mi
Douglas	46.8°F	59mi
Aberystwyth	48.3°F	66mi

* current water temperature in this city

** straight line distance from Holyhead